Title: NASA’s Integrated Instrument Simulator Suite for Atmospheric Sensing from Spaceborne Platform (ISSARS) and it’s role for the Ace and GPM Mission
Author: Simone Tanelli
Organization: Jet Propulsion Laboratory
Co-Authors: Wei-Kuo Tao, Toshihisa Matsui, Chris Hostetler, John Hair, Carolyn Butler, Kwo-Sen Kuo, Noppasin Niamsuwan, Michael P. Johnson, Joseph C. Jacob, Alessandro Battaglia, Stephen L. Durden, David J. Diner, John Martonchick, Olga Kalashnikova, Joe Turk, Takashi Nakajima, Tristan L'Ecuyer, Sonia Kreidenweis, Graeme Stephens, Andrew J. Heymsfield, David Donovan, Gerd-Jan Van Zadelhodff, Joel T. Johnson, Ninoslav Majurec, Antonio Parodi, Liang Liao, S. Kneifel, Ralf Bennartz, Mark Kulie, Greg Tripoli, Tempei Hashino, Detlef Mueller, Pavlos Kollias, Wanda Szyrmer, Aleksandra Tatarevic, Gijs DeBoer, Steve Ghan; Ann Fridlind, Andy Ackermann, Guosheng Liu

Forward simulation is an indispensable tool for evaluation of precipitation retrieval algorithms as well as for studying snow/ice microphysics and their radiative properties. The main challenge of the implementation arises due to the size of the problem domain. To overcome this hurdle, assumptions need to be made to simplify complex cloud microphysics. It is important that these assumptions are applied consistently throughout the simulation process. ISSARS addresses this issue by providing a computationally efficient and modular framework that can integrate currently existing models and also capable of expanding for future development. ISSARS is designed to accommodate the simulation need for ACE and GPMís radar and microwave scanners as well as optical instruments such as lidars and polarimeters that will be included in future missions.

ISSARSís computation is performed in three stages: input reconditioning (IRM), electromagnetic properties (scattering/emission/absorption) calculation (SEAM), and instrument simulation (ISM). The computation is implemented as a web service while its configuration can be accessed through a web-based interface.

This presentation will demonstrate configuration procedures and illustrate some sample intermediate outputs of the IRM and SEAM with an emphasis on the role of ISSARS for the ACE and GPM missions.